Head covering



FIG. 1 is a perspective view of a head covering showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view, thereof.

The details shown in broken lines form no part of the claimed design. 

The ornamental design for a head covering, as shown and described: 